Disk Space Mapper

Disk Space Mapper

Overview

Quickly analyze disk usage across your filesystem, identify space hogs, and find old directories taking up storage. Perfect for cleanup projects, storage audits, and identifying which projects are consuming the most disk space.

Quick Start

Analyze a directory to see disk usage sorted by size:

python3 analyze_disk.py -d /path/to/analyze

Find old (>180 days) and large (>20MB) directories:

python3 analyze_disk.py -d /path/to/analyze -m 180 -s 20 -o report.txt

Common Tasks

1. Storage Audit

See what's consuming disk space in a directory tree:

python3 analyze_disk.py -d /Users/tonytam/git

Results automatically sort by size (largest first), showing:

• Directory path
• Size in MB
• Last modification date
• Days since last change

2. Find Cleanup Candidates

Identify directories not touched in 6 months that are larger than 20 MB:

python3 analyze_disk.py -d /Users/tonytam/git -m 180 -s 20 -o candidates.txt

3. Identify Recent Changes

See active directories (modified recently, largest first):

python3 analyze_disk.py -d /active/projects

Look for low "Days Since Change" values.

4. Threshold Filtering

Find anything over 100 MB:

python3 analyze_disk.py -d /data -s 100

Or anything older than 1 year:

python3 analyze_disk.py -d /archive -m 365

Available Scripts

Python Version (Recommended)

File: scripts/analyze_disk.py

Full-featured Python implementation. Use this for most tasks.

Options:

• -d, --dir DIR - Base directory to analyze
• -m, --min-days DAYS - Filter: only dirs older than N days
• -s, --min-size SIZE_MB - Filter: only dirs larger than N MB
• -o, --output FILE - Save results to file

Example:

python3 analyze_disk.py -d /git -m 180 -s 20 -o old_large.txt

Bash Version

File: scripts/analyze_disk.sh

Lightweight shell script using standard Unix tools (du, stat, find).

Options: Same as Python version with - prefix

Example:

./analyze_disk.sh -d /git -m 180 -s 20 -o old_large.txt

Output Format

Results are pipe-delimited (easy to parse or import):

Directory|Size (MB)|Last Modified|Days Since Change
==================================================
/path/to/large_dir|554 MB|Feb 23 13:34:56 2025|307 days
/path/to/medium_dir|242 MB|Mar 28 15:34:02 2025|274 days
/path/to/small_dir|37 MB|Dec  2 08:05:07 2023|756 days

Always sorted by size (largest first).

Reference Materials

For detailed usage examples, filtering patterns, and scenario-based workflows, see usage_guide.md.

Tips

• No filters: Run without -m or -s to see all directories
• Always sorted: Output automatically sorts by size (largest first)
• Safe: Read-only analysis, no files are deleted
• Fast: Most directory trees scan in under 30 seconds
• Flexible: Use with grep, cut, or other Unix tools to further process results